Roofing



Aug. 18, 1925.

A. WINDING ROOFING Filed Dec. 8, 1922 INVENTOR."

A TTORNEY Patented Aug. 18, 11925.."

UNITED sTATi-:sl

ARTHUR WINIDING, 0F WAUWATOSA, WISCONSIN.

` ROOFING.

Application led December 8, 1922. Serial No. 605,584.

'To all whom t may concern:

Be it known that I, ARTHUR WINDING, a citizen ofthe United States, residing at the town' 'of Wauwatosa, in the county of Milwaukee and State of Wisconsin, have invented certain new and' useful Improvements in Roofngs, of which the following is a. specification, reference being had to the accompanying drawing, forming a part thereof.

This invention relates more particularly to roofing made in factories ready for laying and consisting of continuous or long flexible waterproof sheets of librous material such as the so-called roofngfelt, or asbestos roofing, and laid with lapped joints.

The main objects of the invention are to avoid exposed straight or continuous edges on the overlapping parts of the sheets, which tend when laid and nailed in the ordinary way, to buckle, wrinkle or curl, on account of unequal expansion and contraction due to v variations in temperature and humidity, and

to spring 'away fr the underlying sheets, so that wind, rainor water can get. between the sheets and lift and separate the overlapping edges from the underlyingsheets thereby causing disintegration of the pitch coating between them,` and leaking 'and rapid destruction or deterioration of the roofing; to avoid the use of exposed nailing strips or nails for fastening the overlapping edges of the sheets in place; and generally to improve the construction and facilitate -the laying of prepared rooting of this class.

It consists in the construction and ymethod of laying the roofing sheets and' in the arran ement and combination of parts of the roo g as hereinafter particularly described and pointed out inthe claims.

In the accompanying drawing like characters designate the same parts in the several figures.

Figure 1 is a plan view of a limited portion of roofing comprising parts of lapping sheets constructed and laid in accordance with the invention; Fig. 2 is a section on the line 2 2, Fig. l; Fig. 3 is a similar section of the serrate and perforated overlap.

ping edge of a sheet before it is laid and cemented to an adjoining sheet; 4 is a plan view similar to Fig. 1 of a modification of the roofing; and Fig. 5 is a section on the line 5-5, Fig. 4.

Referrmg to Figs. 1, 2 and 3, one practical embodiment of the ro'ong comprises flexible waterproof sheets 1, of fibrous material such as the Sio-called prepared roofing felt or asbestos rooiing. The sheets are laid in accordance with the usual practice in laying such roofing, beginning with one side of a roof, usually the lower side when the roof is inclined, and progressing towards the higher or other side of the roof, each succeeding sheet being lapped over the preceding shet.

To the lapped 'portion of each preceding sheet a heavy coating 3, of pitch such as asphalt, coal tar or the like, is applied before the next sheet is laid. The overlapping portion of each succeeding sheet is formed with a serrate or zigzag edge 4, and to further insure a secure bonding or attachment of the overlapping part of the sheet to the underlying sheet, may be formed adjacent the serrate or zigzag edge, with holes or perforations 6, of any suitable shape or size, preferably arranged in a series parallel with the longitudinal edges of the sheet and suitably spaced from one another.

The overlapping parts of the sheets as they are successively laid, are pressed into and embedded in the coatings 3 of pitch by which the lapping portions of the sheets are cemented to each other and the joints between the serrate edges of the overlapping parts of the sheets and the underlying parts of adjoining sheets are covered, protected` and-sealed against the entrance of wind, air, rain or water between the sheets. The disintegration or deterioration of the pitch coatlng between the sheets and consequent detachment and separation of the lapped portions of the sheets from one another are thus prevented.

The soft or plastic pitch in which the overlapping parts of the sheets are embedded, is displaced and pressed outwardly and upwardly around the serrate edges 4 of the sheets and into the spaces between the underlying edges 5 andthe overlying portions of adjoining sheets, as shown in Fig. 2. ,When the sheets are perforated adjacent their serrate edges, as shown in Fig. 3, the soft or plastic pitch is pressed upwardly and illsthe holes or perforations 6, preferably till it overflows the edges of the holes or perforations, as shown in Figs. 1 and 2, thereby forming bonds or additional fastenings 7 between the sheets, the bonds when on a cement, concrete, tile or similar roof.

9 adjacenthe underlapping edges 5. The

lapped portions of the sheets are thus cemented and secured together, and the roofing cemented and secured to the foundation .8 by the pitch coatings; nailing strips or nails for fastening the lapped portions of the sheets together and the roofing to the foundation, are entirely dispensed with, and the labor and trouble of nailing, the warping or buckling of the sheets and leakage incident to the use of nails, are avoided.

' The lapped portions of the sheets are permitted by the semi-fluid and elastic properties of the pitch, to shift slightly upon one another and upon the foundation under varying conditions o-f temperature and humidity, thereby tendingl to avoid buckling, warping and separation of the sheets from one another and from the foundation.

When the roofing is laid as shown in Figs. Lland 5, on a board, wood or other foundation 8', having joints, cracks or openings through which fluid or softened pitch could run, the continuous coating 9 of pitch used foundation is omitted, andthe coatings 3 between the lapped portions of the sheets are kept out of contact withthe foundation. This may be accomplished by applying the coatings 3 so that they will terminate some distance from the underlying edges 5 of the sheets, or preferably', as shown, by flexible extension strips 10 ofroofing material lapped underneath and extending beyond the overlapped edges 5 of the Vsheets 1, and fastened therewith at intervals by nails 11 to the foundation 8. The coatings 3 of pitch are then spread completelyover the underlapping portions of the sheets 1., covering the nail heads and adjacent ortions of the upper sides of the strips 10, utterminating adistance from the then exposed edges 5 of the strips which are subsequently covered by successively laidsheets. l

To insure covering, protecting and eifectively sealing the overlapping serrate or zigzag edges 4 of the sheets and preventing the entrance of wind, air, rain or water beftween the lapped portions of` the sheet-s,

extra coatings l2 of pitch may be applied to the overlapping parts of adjoining sheets, as

shown in Figs. 4 and 5, such coatings extending over and coalescing and uniting Awith the coatings 3 between the sheets along the serrate or zigzag edges thereof.

When the sheets are perforated as shown, these outer coatings 12 extend over the holes or perforations 6 and coalesce with the bonds 7 thus reinforcing and increasing the effectiveness of the bonds and of the .pitch coatings 3 between the sheets to secure the lapping portions of adjoining sheets to each other and exclude air and water from the joints between them.

I claim: j

1. A flexible waterproof roofing sheet of fibrous material having a serrate edge and holes adjacent the serrate edge for overlapping, bonding and sealing it with pitch to an underlying sheet.

2. Roofing comprising lapped waterproof sheets, one sheet having a serrate edge overlapping and cemented to an underlying sheet by a coating of pitch in which the overlapping serrate edge is embedded and sealed.

3. Roofing comprising lapped waterproof sheets having serrate edges and perforations overlapping adjoinin sheets and cemented thereto by pitch in w 'ch .the serrate edges of the sheets are embedded and sealed, the pitch being pressed upward into the perforations and forming bonds between the lapped portions of the sheets at a distance from the overlapping serrate edges.

4. Roofing comprising lapped flexible sheets having serrate edges overlapping adjoining sheets and cemented thereto by coatings of pitch in which the serrate edges are embedded and sealed and an extra coating of pitch applied to the upper sides of the overlapping portions of the sheets and coalescing along the serrate edges of the sheets with the coatlngs between adjoining sheets.

5. Roofing comprising lapped flexible sheets having serrate edges and perforations adjacent-the serrate edges, the lapped portions of adjoining sheets being cemented and secured together by coatings of pitch in which the overlapping serrate 'edges are embedded and sealed and which are pressed upwardly into such perforations to form bonds, and extra coatings of pitch applied to the overlapping parts of adjoining sheets and coalescing with the coatin between the sheets along the overlapping serrate edges and with the bonds in the perforations.

6. Roong comprising lapped iexible .sheets having serrate ovf lapping edges,

`tially covering the extension strips an ceinenting and securing the overlapping to the underlying portions of the sheets, the overlapping serrate edges of the sheets being embedded in-and sealed byt the pitch Coatlngs.

7. A exible, Waterproof sheet provided with avserrate edge to prevent the buckling, wrinkling, or curling ofthe edge of the sheet as a whole, saidserrate edgebeing adapted to be cernentedto an underlying member at the plurality of the separate edges of the serrate edge, holes being provided in said overlapping strips of roofing material having their exposed edges serrated, and `a 'bonding material applied to the adjacent surfaces of said strips at said edges'.

In witness whereof I hereto affix iny signature.

ARTI'I UH WINDING. 

